Table 4.
Characteristics of the study participants from the NHANES dataset
| Category | Totala | NWa | OW/OBa | p-valueb |
|---|---|---|---|---|
| Sample (n) | 1854 | 831 | 1023 | - |
| Age (years) | 32.7 ± 0.3 | 31.7 ± 0.4 | 33.5 ± 0.4 | 0.001** |
| Weight (kg) | 70.5 ± 0.7 | 59.0 ± 0.3 | 81.2 ± 0.8 | <0.001*** |
| Height (m) | 163.1 ± 0.3 | 163.6 ± 0.4 | 162.7 ± 0.3 | 0.075 |
| Body-mass Index (kg/m2) | 26.5 ± 0.2 | 22.0 ± 0.1 | 30.6 ± 0.2 | <0.001*** |
| Normal weight (%) | 48.2 ± 2.1 | 100 | - | - |
| Overweight (%) | 26.0 ± 1.6 | - | 50.3 ± 2.6 | |
| Obese (%) | 25.7 ± 1.7 | - | 49.7 ± 2.6 | |
| Waist circumference (cm) | 88.29 ± 0.55 | 78.6 ± 0.3 | 97.3 ± 0.7 | <0.001*** |
| Systolic blood pressure (mmHg) | 111 ± 1 | 108 ± 1 | 114 ± 1 | <0.001*** |
| Diastolic blood pressure (mmHg) | 68 ± 1 | 67 ± 1 | 69 ± 1 | 0.001** |
| Blood counts | ||||
| Red blood cell (n) | 4.49 ± 0.19 | 4.45 ± 0.02 | 4.52 ± 0.02 | 0.002** |
| White blood cell (n) | 7.32 ± 0.07 | 7.07 ± 0.08 | 7.57 ± 0.11 | 0.001* |
| Platelet count (103/mL) | 293.7 ± 2.3 | 284.6 ± 4.7 | 302.2 ± 3.1 | 0.008* |
| Mean platelet volume (fL) | 8.16 ± 0.02 | 8.14 ± 0.05 | 8.18 ± 0.04 | 0.553 |
| MPR | 2.98 ± 0.03 | 3.08 ± 0.06 | 2.89 ± 0.04 | 0.025 |
| Laboratory results | ||||
| Follicle stimulating hormone (mIU/mL) | 7.7 ± 0.5 | 8.1 ± 0.6 | 7.3 ± 0.6 | 0.262 |
| Luteinizing hormone (mIU/mL) | 9.7 ± 0.9 | 10.6 ± 1.1 | 9.0 ± 1.2 | 0.260 |
| Days since the last period | 15.1 ± 0.3 | 15.3 ± 0.4 | 14.9 ± 0.4 | 0.480 |
Abbreviations: NW: normal weight group; MPR: the mean platelet volume to platelet count ratio; OW/OB: overweight/obese group.
a
Data are presented as mean or frequency ± standard error.
b
p-value corresponds to the difference between the NW and OW/OB groups determined by either the Chi2 test, Student’s t-Test, or Mann-Whitney U test.
Significant results (two-tailed) are indicated as follows:
*
P<0.05;
**
P<0.01;
***
P<0.001.